#include <stdio.h>

#define PI 3.14159

#define SQUARE(x)((x)*(x))
int main(){
    printf("PI: %f\n",PI);
    printf("Square of 5: %d\n",SQUARE(5));
    #ifdef DEBUG
    printf("Debugging is enabled\n");
    #else
    printf("Debugging is disabled\n");
    #endif
    return 0;
}